Sewer-trap



. RIPPLE.

SEWER TRAP,

APPLICATION man FEB. I6. 1919.

Patented Jan. 13, 1920.

/lV VEN TOI? A (MNH,

fihi 11E@ STATES PATENT @ECE JOHN-W. RIPPLE, GF BALTIMORE, MARYLAND.

SE'W 13R-TRAP.

Lezama.

Application led February 18, 1919.

To all whom t may concern.

Be it known that I, JOHN W. RIPPLE, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful lmprovements in Sewer-Traps, of which the following is a specification.

This invention relates to improvements in sewer traps, and has. for its object to provide a simple and eflicient device to prevent the escape of gases from the sewer and to so construct the trap that the valve will be kept clean at all times in order that the said valve will be sealed when the water is not flowing therethrough.

IThe invention consists of the novel construction and arrangement of the parts and combination of parts hereinafter more fully set forth in the following specification and pointed out in detail in the appended claims.

1n the accompanying drawing,-

Figure 1 is a vertical longitudinal section of a sewer showing my invention applied thereto.

Fig. 2 is a detail plan view of the metal plate which has the valve on the under surface thereof.

Referring to the accompanying drawings, forming part of this specification, and in which like reference numerals designate like parts throughout the several views thereof, 1 designates the opening to the sewer and leads to the chamber 2 constructed of concrete 3. At the lower end of the chamber 2 is a metal plate 4 which has its sides and ends embedded in the concrete 3 and is provided with ribs 5 -to strengthen said plate. The said plate 4 has an opening 6 around which is an annular downwardly-projecting lip 7, the lower edge of which is made on an angle of about ninety degrees. On the inner surface of the lip 7 is an inclined flange e which decreases in size frorn ,the longer toward the shorter side of the said lip so as Speccation of Letters Patent.

Patented J al1. 13, 1920.

serial No. 277,717.

to throw the water against the upper end of the valve 9 and cause it to flow down over the surface of said valve and wash it clean of dirt, `grit or other substance that might tend to prevent said valve closing tightly against the lip 7 T he said valve 9 is pivoted at its upper end to the lug 10 on the plate 4 and is held normally against the lip 7 by the weight 11 on the arm 12. Said weight; is adjustable along said arm 12 and is held to the adjusted position by the set-screw 13. rlhe water passes through the lip 7 to the chamber 14 and then passes off through the sewer-pipe 15.

It will thus be seen that the water flowing from the chamber 2 through the opening 6 will be thrown against the upper surface of the valve 9 by the inclined flange 8 thereby always washing 0E the inner surface of said valve 9 thus freeing it from any dirt or grit and permitting it to close tightly when the water is not flowing therethrough.

Having thus described my invention, what I claim is:

1. The combination with a sewer o f a metal plate having an opening therein, a lip around the edge of said opening and projecting from said plate, an inclined flange on the inner surface land which decreases in size toward'its lower end of the incline, and a valve pivoted to said plate and adapted to close said opening.

2. The combination with a sewer of a plate having an opening therein, a lip around the edge of said opening and projecting from said plate, the lower edge of said lip being inclined, and an inclined flange on the inner surface of said lip which decreases in size from the upper to the lower part of the incline, a valve pivoted to said plate and adapted to close said opening, and means to hold the valve normally closed.

In testimony whereof I affix my signature.

JOHN WL RIPPLE. 

